Process of burning tree-stumps



H. L. HANSON AND M. B. SAWYER. PROCESS OF BURNING TREE STUMPS.

APPLICATION FILED Nov. 9. I918.

1 8 5 2, 26 1 Patented Sept. 7, 19,20.

Hartman. i mnsonf ".BU'.LJT3E,V ontana, AND; .traalon; 2a

1 .t 11.. x WASH-INGTON.. if

v I g a tees tile member; 9*, sles, i i Serial11105523132? 1 Tda'Z'Zifltom it may mm? 1' A Be it known that we, El nor!) Hanson and Marion" "B. SAWYER; citizens of the United States, residing. respectively at Butte; in the 'countygof 'Si-lverbow and State of Montana; andat Ethnon'ds, in the county of Snohomish and State of Washington, have invented new and useful Improve-V ments in Processes of Burning Tree- Stumps, of which the following is a specification. f

The present invention 'cornprehends generally improvements in stump destroyers and more particularly relates to a process of burning tree stumps.

to provide a process of the above mentioned character which consists in boring passages within the stump, then building a fire therein and finally forcing a draft of air through one of the passages fOI'JDSllIlIlg: of an effective internal combustion and the consequent burning of the stump so as to render the ground available for cultivation.

More particularly, the invention consists in the provision of a process of the char-' acter mentioned wherein a pieceof red hot charcoal 1s dropped into one of the'pas;

sages and then air is forced through the;

said passage and the other passages to form charcoal about the passages, which is con- Y sumed, and'on the continued forcing of air the fiber immediately adjacent the charcoal 'is prepared so thatcharcoal may eventuallybe produced and all of the charcoal ulti mately consumed insuring of the burning.

of the stump from the center of the base to the top and outer surfaces and at the base thereof.

Other objects as well as the nature, characteristic features and scope ofthis invention will be more readily apparent from the following description taken in connection with. the accompanying drawings and pointed out in the claims forming a part of this specification.

The invention is clearly illustrated in the accompanying drawings, in which:

Figure 1 is a vertical sectional view of the stump properly bored and with an air conducting pipe attached thereto and in elevation.

Fig. 2 is a top plan view of the stump,

' and I; "stscre afie er Letters mane.

The invention has for its'principal object ig l 3153' aorizenareeeeeaaiwea er C lms-gating: f"

Similar characters "of reference" fie?" nmate ?c rre pon n a t 'Referrlng' now, more particularly to the mem 192e,; l'

7 i l iifli f e'd sc bi l views 1 -E ra ce accompanying drawings, there is illustrated r stitutes a fire or combustion chamber 3.

The bottom of the fire chamber is positioned adjacent the base of the stump while the stump is further provided with aplurality. V l

of converging flues 4 preferably downwardly inclined which extend fromz the outer'surface of the stump and at a point above the surface of the groundfiand above the visible branch. roots and communicate. with the passage 2 adjacent-the fire chamher 3. -A fire 5is n0w started in the charm her 3 and preferably consists of a piece of red hot charcoal which is dropped through the passage 2 into the chamber '3 while an air conducting tube is now fitted to the top .of the passage 2 so that the air may be forced down through the passageQ upon the fire '5'while the boresor fines insure of the ignition of the fiber about the passages and fines which produces cha'rcoah and on the continued application of air the outer or adjacent surfacesof' the charcoal will be. consumed while the continued burning" prepares the fiberbehind the charcoal for burning so that more charcoal will be'produced all of 'which is ultimately-consumed.

V'Attention is particularly directed to the an. rangement of the passage. 2 and the flues ,4:- -which insure of the properand effective combustion centrally of and at the base of J the stump, causing an equal burning from the center of the base to the-top and outer surfaces and at the base of the stump.

However, if one portion of the trunk is'being consumed faster than the otherthe adi V jacent flue may be stopped by a plug of clay or other material so as to retard the draft through such fiue'o'r passage. 1

It is believed inview of the foregoing description that a further detailed description of thepro'ce'ss is unnecessary, It is also believed that the advantages will be readily apparent. However, by the employ- V ment of'this process it is to be appreciated cleared of stumps and thereby render available for cultivation vast acres of cut Over 'timber ia-nds'which would otherwise be m 7 What is claimedisz -1 The process for burn'ing tree"stumps;

,"which consists in providing a verticalair passage substantially in'the center of the stump, then providing a vplurality 0f flue passages communicating With'the' airjpassage and :openin ,on the sides of the stump,

then starting a '2. The process for burmng re in the air passage, and finally forcing a draft of airrinto the'air tree stumps, which consists; providinga substantially central -vertiqa1} air passage in the stump;

then forming flue passages opening onto the periphery of thestump andtcommunicating interiorly with the air"-.-pass'age,' thenista'rti'ng'afirein-the1b0tt m0f the air passage,

thenrforci ng a dr a ftjof air into the air vpa ssageandOufi-threughithe fluep'assages, and a 25 finally plugging such air passages as the fire-seems to follow,,thereby causing-the In testimony whereof vWe aifix our signa HAROLD L. HANSON,

' draft tozpass out o fthje remaining passages. "and thus direct thefire in theirdirection,- v sov that a uniform burning 0f the stump may J be had. ,30 r

; MARION. B LSAWYE 

